C-Vinylation of 1-Vinylpyrroles with Benzoylacetylene on Silica Gel - Trofimov, Boris A; Stepanova, Zinaida V; Sobenina, Lyubov N; Mikhaleva, Al’bina I; Ushakov, Igor’ A; Elokhina, Valentina N (Synthesis, 2001)